We had wonderful 2 hours workshop about oVirt. I showed basic usages, the architecture and some advanced parts (scheduling, qos, quotas declaration and more) that user can use by playing with ovirt live usb stick (https://www.ovirt.org/download/ovirt-live). Thanks for all participates ! It was pleasure to be part of Fossasia. Fell free to contact me any time - Yaniv Bronhaim - ybronhei@redhat.com

1. FOSSASIA, March 2016
The oVirt Way
General Product
Overview
Senior Software Engineer,
Maintainer @ RHEV
Red Hat IL
March 2016, FOSSASIA, Singapore
Yaniv Bronhaim

2. FOSSASIA, March 2016
The oVirt
● Open source
● What is oVirt
● Utilizing Virt and KVM features
● Architecture
● Road-map
● Ovirt 4.0 and beyond

3. FOSSASIA, March 2016
Open Source:
● It's not just for Linux
● It may or may not have support
● You don't have to be an expert to use it
● You have full access to the source code
● You're probably already using it

4. FOSSASIA, March 2016
Provide an open source alternative
to vCenter/vSphere/Xen
Large scale, centralized
management for server and
desktop virtualization
Based on leading performance,
scalability and security
infrastructure technologies
Focus on ease of use/deployment
What is oVirt?

5. FOSSASIA, March 2016
Who is behind it

6. FOSSASIA, March 2016
oVirt stack
Core
● oVirt-Engine
● VDSM
● Host deploy
● oVirt-Node
● oVirt-Engine-SDK
– rubyjavapython
● oVirt-Engine-CLI
● oVirt-Guest-Agent
● oVirt-Image-Uploader
● oVirt-iso-Uploader
● oVirt-Log-Collector
● oVirt-DWH
Tests Projects
● Ovirt-vdsmfake
● testenv
● oVirt-live
● Ovirt-Reports
● Otopi
● Hosted-Engine
● KVM
Python Infra
● cpopen
● pthreading
● Ioprocess
● safelease
And much more...

7. 8FOSSASIA, March 2016
Kenrel-based Virtual Machine
● Included in Linux kernel since 2006
● Runs Linux, Windows and other
operating system guests
● Advanced features
– Live migration
– Memory page sharing
– Thin provisioning
– PCI Pass-through
● KVM architecture provides high
“feature-velocity” – leverages the
power of Linux

8. FOSSASIA, March 2016
Using KVM
/usr/libexec/qemu-kvm -name vm-f16-buildmachine -S -M rhel6.4.0 -cpu
Westmere -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -uuid a8ccdb60-8a42-44f5-
9669-d74c3b2eff43 -smbios type=1,manufacturer=Red Hat,product=RHEV
Hypervisor,version=6Server-6.4.0.4.el6,serial=30353036-3837-4247-3831-
30394635324C_78:e7:d1:22:46:d8,uuid=a8ccdb60-8a42-44f5-9669-d74c3b2eff43 -nodefconfig
-nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm-f16-
buildmachine.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc
base=2013-10-08T12:16:16,driftfix=slew -no-shutdown -device piix3-usb-
uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-
serial0,bus=pci.0,addr=0x4 -drive if=none,media=cdrom,id=drive-ide0-1-
0,readonly=on,format=raw,serial= -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-
0,id=ide0-1-0 -drive file=/rhev/data-center/f79b0b28-c82f-11e0-8739-78e7d1e48c4c/5bab6470-
8825-4e3a-b408-ebcde93678b6/images/4c213cd2-c4d5-441b-a1ac-dfb1a6868699/11b3e132-50a5-481b-
b48b-e3b1f2879e69,if=none,id=drive-virtio-disk0,format=qcow2,serial=4c213cd2-c4d5-441b-a1ac-
dfb1a6868699,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive
file=/rhev/data-center/f79b0b28-c82f-11e0-8739-78e7d1e48c4c/5bab6470-8825-4e3a-b408-
ebcde93678b6/images/02330fa2-d1ff-48e0-a843-842c2376756f/5a283126-4d27-4eef-86dd-
fb538d8d08e4,if=none,id=drive-virtio-disk1,format=qcow2,serial=02330fa2-d1ff-48e0-a843-
842c2376756f,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1 -netdev
tap,fd=31,id=hostnet0,vhost=on,vhostfd=32 -device virtio-net-
pci,netdev=hostnet0,id=net0,mac=00:1a:4a:23:12:13,bus=pci.0,addr=0x3,bootindex=2 -chardev
socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/vm-f16-
buildmachine.com.redhat.rhevm.vdsm,server,nowait -device virtserialport,bus=virtio-
serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm -chardev
socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/vm-f16-
buildmachine.org.qemu.guest_agent.0,server,nowait -device virtserialport,bus=virtio-
serial0.0,nr=2,chardev=charchannel1,id=channel1,name=org.qemu.guest_agent.0 -chardev
spicevmc,id=charchannel2,name=vdagent -device virtserialport,bus=virtio-
serial0.0,nr=3,chardev=charchannel2,id=channel2,name=com.redhat.spice.0 -spice port=5904,tls-
port=5905,addr=10.35.16.4,x509-dir=/etc/pki/vdsm/libvirt-spice,tls-channel=main,tls-
channel=display,tls-channel=inputs,tls-channel=cursor,tls-channel=playback,tls-
channel=record,tls-channel=smartcard,tls-channel=usbredir,seamless-migration=on -k en-us -vga
qxl -global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=67108864

9. FOSSASIA, March 2016
How Does It Look?

10. Live snapshot
Task Management
Async Operations
Live Migration
Overcommit
CPU, Memory, I/O
Hotplug
External Providers
Hosted
Engine + HA engine
Live Storage Migration
SSO
NUMA
SPICE
Memory
Ballooning
PCI pass through
QuotaImport Storage
Domain
VIRT V2VProgress Live
Processes
Iscsi , NFS
Management
Network Interfaces
Management
Cinder
User Roles
Fence Kdump support PPC Support
Foreman Hosts
Provisioning
Host Upgrade
Manager
Expose Errata
Information
SRIOV Support

11. 12FOSSASIA, March 2016
The oVirt's Entities
Data Centers
GuestVM
Storage
Linux Hypervisors
GuestVM
Virtual ClustersNetwork

12. 13FOSSASIA, March 2016
● What makes up a Hypervisor?
– OS FedoraRed Hat Enterprise LinuxCentOsUbuntu
– VDSM
● Hardware Management
● Memory Manager
● Storage Manipulations
● Resource Management
● Scheduling
● Access Control
● Power Management
● Memory Manager
● Device Model (emulation)
● Virtual Machine Monitor
Linux as a Hypervisor?

13. FOSSASIA, March 2016
oVirt Node
● Standalone hypervisor
– Small footprint < 100MB
● Customized 'spin' of Fedora +
KVM
● 'Just enough' Fedora to run virtual
machines
● Runs on all RHEL hardware
with Intel VT/AMD-V CPUs
– Easy to install, configure and upgrade
● PXE boot, USB boot, CD or Hard
drive
● Node 4.0 new generation

14. 15FOSSASIA, March 2016
● What makes up a cluster?
– Group – Migration domain
– Share Specification
– Share Storage Array
– Network Cluster
● Provides Migration Abilities
Cluster Of Hypervisors

15. 16FOSSASIA, March 2016
● What is a VM
– User level process
– Controls part of the hypervisor hardware
– Attached to storage disk
– Exposes VDI access control
Guest Virtual Machine

16. FOSSASIA, March 2016
The Environment – Why clusters?

17. FOSSASIA, March 2016
Multi-Datacenter/Multi-Host

18. 19FOSSASIA, March 2016
Live Migration
• Dynamically move virtual machines
between hosts
● No service interruption
● Applications continue to run
• Migrate even I/O intensive workloads
such as databases
• Perform hardware maintenance
without application downtime
• Dynamically balance workloads
between host systems

19. 20FOSSASIA, March 2016
• Build a highly available enterprise
infrastructure
• Continually monitor host systems and
virtual machines
• Automatically restart virtual machines in
case of host failure
● Restart virtual machine on another
node in the cluster
• Use live migration to “fail-back” a VM to
it's original host when the server is
restored
High Availability

20. 21FOSSASIA, March 2016
System Scheduler
• Dynamically balance
workloads in the data center.
• Automatically live migrate
virtual machines based on
resources
• Define custom policies for
distribution of virtual machines
Maintain consistent resource usage across the
enterprise data center

21. 22FOSSASIA, March 2016
Power Saver
Define policies to optimize workload on a fewer number of servers during “off-
peak” hours
Turn off servers – Saving money

22. FOSSASIA, March 2016
ArchitectureArchitecture

23. FOSSASIA, March 2016
libvirt
VDSM
Host | Node
libvirt
VDSM
Host | Node
Linux/Windows
client
Linux/Windows
client
Shared Storage
FC/iSCSI/NFS
Shared Storage
FC/iSCSI/NFS
Linux VMLinux VM Win VMWin VM
oVirt
Engine
Java
oVirt
Engine
Java
SDK/CLI
Python
SDK/CLI
Python
R
E
S
T
R
E
S
T
ADAD
IPAIPA
Local StorageLocal Storage
Guest agentGuest agent Guest agentGuest agent
Admin Portal
GWT
Admin Portal
GWT
User Portal
GWT
User Portal
GWT
PostgresPostgres
oVirt High Level Architecture
SPICE

24. FOSSASIA, March 2016
Engine Core (Backend)
Host
Register/Install
Host
Register/Install
Host
Monitoring
Host
Monitoring
Host
Maintenance
Host
Maintenance
Host
Fencing
Host
Fencing
Authentication, Authorization
Audit
Authentication, Authorization
Audit
InventoryInventory
Network
Configuration & Monitoring
Network
Configuration & Monitoring
Storage
Configuration & Monitoring
Storage
Configuration & Monitoring
VM & Template Life Cycle
create, schedule, snapshot
VM & Template Life Cycle
create, schedule, snapshot
Load
Balancing
Load
Balancing
HAHA

25. FOSSASIA, March 2016
virto-serial
Guest AgentGuest Agent
QEMU/KVMQEMU/KVM
Host
Config &
Monitor
Host
Config &
Monitor
Storage
Config &
Monitor
Storage
Config &
Monitor
Network
Config &
Monitor
Network
Config &
Monitor
VM
Config &
Monitor
VM
Config &
Monitor
Auto
Register
Auto
Register
KSMKSM
Zoom In To The Hypervisor's Components
libvirtlibvirt
hookshooks
VDSM

26. FOSSASIA, March 2016
Zoom In To The VM Components
SSOSSO
Virtio-
net
Virtio-
net
Virtio-
block
Virtio-
block
Spice
driver
Spice
driver
USBUSB guest
Agent
guest
Agent
balloonballoon

27. FOSSASIA, March 2016
oVirt Users
How to use?

28. FOSSASIA, March 2016
Three Pillars of Management
● Simplicity
● Stability
● Functionality

29. FOSSASIA, March 2016
Simplicity
● Installation
– yum install -y ovirt-engine; engine-setup
● http://www.ovirt.org/Build_and_Install_Engine_RPM
● http://www.ovirt.org/OVirt_Engine_Development_Environment
● oVirt-Host-Deploy process
● oVirt Node
● Varied user interaction mechanisms
– Python CLI, Python/Java SDK
● Configuration - One place, single utility

30. FOSSASIA, March 2016
Stability
● Involvement of big companies
– RHEV is based on oVirt
– IBM, Netapp, Cisco etc.
● Release schedule
– Feature freeze
– Stabilization periods
– Test days
● Continues Integration
– Jenkins jobs – Available upstream
● Active users community

31. FOSSASIA, March 2016
Functionality – Login

32. FOSSASIA, March 2016
Functionality – Admin Console

33. FOSSASIA, March 2016
Functionality –Declare DC and Cluster

34. FOSSASIA, March 2016
Functionality –Declare DC and Cluster

35. FOSSASIA, March 2016
Functionality – Events

36. FOSSASIA, March 2016
Functionality – Add Host

37. FOSSASIA, March 2016
Add Host As Simple As

38. FOSSASIA, March 2016
Add Host From External Management System

39. FOSSASIA, March 2016
Functionality – VM Management

40. FOSSASIA, March 2016
Add Servers or Desktops

41. FOSSASIA, March 2016
Add Servers or Desktops

42. FOSSASIA, March 2016
Define Console - VDI

43. FOSSASIA, March 2016
Virtual Desktop Infrastructure
Centralized management,
security and policy enforcement
Virtual desktops with user
experience of a physical PC
Multiple monitors
HD quality video
Bi-directional audio/video for
VoIP or video-conferencing
Smartcard support
USB support
Industry leading density of virtual
desktops/server

44. FOSSASIA, March 2016
Quick Search

45. FOSSASIA, March 2016
Search Auto Complete

46. FOSSASIA, March 2016
Configure Networks

47. FOSSASIA, March 2016
Interface Details

48. FOSSASIA, March 2016
Without Scripts or Config Files

49. FOSSASIA, March 2016
Attach Storage Domain

50. FOSSASIA, March 2016
Configure Storage Once for Entire Cluster

51. FOSSASIA, March 2016
Extend with More LUNs as Needed

52. FOSSASIA, March 2016
Assign Permissions to Objects by Roles

53. FOSSASIA, March 2016
Define Your Own Roles

54. FOSSASIA, March 2016
User Portal

55. FOSSASIA, March 2016
Self Provisioning Portal

56. FOSSASIA, March 2016
User Resource View

57. FOSSASIA, March 2016
REST API

58. FOSSASIA, March 2016
Python SDK
- Creating the proxy
- Listing all collections
- Listing collection's methods.
- Querying collection with oVirt search
engine.
- Querying collection by custom constraint.
- Querying collection for specific resource.
- Accessing resource methods and
properties.

59. FOSSASIA, March 2016
oVirt CLI

60. FOSSASIA, March 2016
oVirt Reports

61. FOSSASIA, March 2016
Notification Service
● oVirt allows registration to certain audit events
● The notification service
sends emails per audit
message to relevant
users
● Also monitors engine
itself

62. FOSSASIA, March 2016
Hooks
● “Hook” mechanism for customization
– Allows administrator to define scripts to modify VM operation
● eg. Add extra options such as CPU pinning, watchdog device,
direct LUN access, etc
– Allows oVirt to be extended for new KVM features before full
integration is done
– An easy way to test a new kvm/libvirt/linux feature

63. FOSSASIA, March 2016
Hooks
● Hook scripts are called at specific VM lifecycle events
● VDSM (management agent) Start
● Before VM start
● After VM start
● Before VM migration in/out
● After VM migration in/out
● Before and After VM Pause
● Before and After VM Continue
● Before and After VM Hibernate
● Before and After VM resume from hibernate
● On VM stop
● On VDSM Stop
● Hooks can modify a virtual machines XML definition before VM start
● Hooks can run system commands – eg. Apply firewall rule to VM

64. FOSSASIA, March 2016
UI-Plugin: Easy Java Script

65. FOSSASIA, March 2016
UI-Plugin: oVirt Monitoring sub-tab
More info at: https://labs.ovido.at/monitoring/wiki/ovirt-monitoring-ui-plugin

66. FOSSASIA, March 2016
Also in oVirt but not here
● Gluster Support
● Hot plug
– Cpu, memory, nics
● Shared disks
● PPC support
● Integration with:
– Foreman, Glance,
Neutron, Cinder ..
● Live snapshot with
ram
● Numa
● Live storage
Migration
● Upgrade Manager
● Events
● Network Broker

67. FOSSASIA, March 2016
Getting oVirt
● Obtain from oVirt website -
– http://www.ovirt.org/Download
● Fedora And oVirt repositories
(resources.ovirt.org)
● Live USB - http://wiki.ovirt.org/wiki/OVirt_Live
● Build from source

68. FOSSASIA, March 2016
How To Contribute
● Website and Repository:
– http://gerrit.ovirt.org/
– http://www.ovirt.org
– http://www.ovirt.org/wiki
Join the community
- Find bugs, File Them, Correct Them.
- Translate, Write Documentation.
- Design Interfaces, Develop new features
- Share your experiences.
Everyone can make a difference.
● Mailing lists:
● http://lists.ovirt.org/mailman/listinfo
● IRC:
● #ovirt on OFTC

69. FOSSASIA, March 2016
What's Next
● Release 3.6
● Up coming 4.0
● Test days

70. FOSSASIA, March 2016
THANK YOU !
http://www.ovirt.org
ybronhei@redhat.com